Abstract: Provided is a binarization method for CT sectional image of fiber package containing artifacts, which includes: performing brightness adjustment on the source image obtained after converting of the HSV image model by using a composite tangent function; creating a planar morphological structural element having a morphology similar to that of a target object to obtain a background image without the target object; obtaining a second intermediate image by a subtraction operation of the first intermediate image and the background image; improving an image contrast of the second intermediate image again to obtain a third intermediate image; and binarizing the third intermediate image by using a local adaptive threshold binarization algorithm and removing a background noise to obtain a final binarized image. The binarization method can improve the uneven brightness of the image under complex illumination, alleviate the artifacts, and strip similar objects from the background with similar gray scales.

Abstract: Disclosed is an LTE-V based Internet of Vehicles communication test system and test method. The test system includes an ENodeB base station, a roadside test unit, user test terminal, LTE-V core network and local server group. Mobile communication technology is applied to the field of Internet of Vehicles communication, and two technical schemes are used, i.e., wide-area centralized cellular communication and short-range distributed direct communication corresponding to the network architectures based on access network-user terminal and ProSe direct communication interface, respectively. Not only the communication transmission support with large broadband in wide coverage can be supported, but also to achieve low latency and highly reliable communication services between vehicle and vehicle, vehicle and base station, base station and base station, to meet the needs of road safety and traffic efficiency applications.

Abstract: An IEEE 802.11p protocol-based vehicle-to-roadside and vehicle-to-vehicle communication test method oriented to the Internet of Vehicles. The method includes: driving a host vehicle and a target vehicle at a same speed on a road segment; the host vehicle being located behind the target vehicle; a constant distance is maintained between the host vehicle and the target vehicle; the host vehicle is equipped with a host vehicular communication unit, the target vehicle is equipped with a target vehicular communication unit communicating with the host vehicular communication unit; calculating a throughput and a round trip time RTT from the target vehicular communication unit to the host vehicular communication unit; repeating driving the host vehicle and target vehicle N times, and calculating an average throughput and an average round trip time (RTT) of the N times; and calculating a network performance parameter ? according to the average throughput and the RTT.

Abstract: Disclosed is an LTE-V based Internet of Vehicles communication test system and test method. The test system includes an ENodeB base station, a roadside test unit, user test terminal, LTE-V core network and local server group. Mobile communication technology is applied to the field of Internet of Vehicles communication, and two technical schemes are used, i.e., wide-area centralized cellular communication and short-range distributed direct communication corresponding to the network architectures based on access network-user terminal and ProSe direct communication interface, respectively. Not only the communication transmission support with large broadband in wide coverage can be supported, but also to achieve low latency and highly reliable communication services between vehicle and vehicle, vehicle and base station, base station and base station, to meet the needs of road safety and traffic efficiency applications.

Abstract: An IEEE 802.11p protocol-based vehicle-to-roadside and vehicle-to-vehicle communication test method oriented to the Internet of Vehicles. The method includes: driving a host vehicle and a target vehicle at a same speed on a road segment; the host vehicle being located behind the target vehicle; a constant distance is maintained between the host vehicle and the target vehicle; the host vehicle is equipped with a host vehicular communication unit, the target vehicle is equipped with a target vehicular communication unit communicating with the host vehicular communication unit; calculating a throughput and a round trip time RTT from the target vehicular communication unit to the host vehicular communication unit; repeating driving the host vehicle and target vehicle N times, and calculating an average throughput and an average round trip time (RTT) of the N times; and calculating a network performance parameter ? according to the average throughput and the RTT.